Cast-metal car-bolster.



PATENTED JAN. 14, 1908. G. G. FLOYD.

GAST METAL GAR BOLSTER. APPLIOATION FILED 111115.25. 1907.

- Emili jf' j.; s 17 1.9

UNTTED sTATEs PATENT oFFioE.

GEORGE G. FLOYD, OF GRANITE, ILLINOIS, A

SSIGNOR TO' AMERICAN STEEL FOUNDRIES, OF

l NEW YORK, N. Y., A CORPORATION OF-NEW JERSEY.

CAST-METAL cAR-BoLsTER.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed March 25. 1907. Serial No. 364.804.

To all whom' it may concern:l v Be it known that I, GEORGE G. FLOYD, a citizen of the United States, residing' at Granite, inthe countyf of Madison and State :of Illinois, have invented certain new and useful lImprovements in Cast- Metal Car- Bolsters, of which the following is a specification...

. 4Cast metal car b olsters, especially truck by my Ipresent, invention which aims to bolsters, are .the lsubject, of v:improvem'ent strengthen such structures by anovel design of distribution of the metal whereby a maxi-- mum of strength is secured with a mmlmum amount and weight of metal'. Beneath the center bearing member of the bolster, which v ispreterablyI integralwith the bolster, and

disposed on the under surface of the compression member or portion of the bolster substantially.- midway between the. longitudinal center of theibolste'r and its longitudinal edges, I providea pair 0i strengthening ribs integral` or unitary' with the bolster,

' these ribs preferably being tapered with their I greatest depth: at the center of the bolster -.and vgradually decreasing toward each end.

Theseribs in my preferred constrnctionare comparatively short, but their dimensions may of-co'urse'be varied according to' the design ndstrength of the bolster.

, In-order to provide. a strong tension mem'- ber lor portion Jfor the bolster, which inits preferred form is of substantially T-.shape in -`cross-section, I supply the lower edge of the verticalvl leg or strip of the bolster with an enlargementy or bulb gradually increasing in thickness with its depth, and whose sides are 1 O po-f curved, desirably reversely curved. sitely extended iiatflanges at the foot ol the vertical member' of a T- bolster have heretofora'been'usedbutthey are diflicult to cast because of the large quantity of overhangingsandi'n the mold which islikelly tobecome dislodged-and ruin the casting. y

My preferred formoibolster is illustrated on the accompanyin i formin" .a part' of s specification and' throng out the variousv views like reference oharac'tersrefer tothesame parts.

Figure. 1 is ``a sidev .elevation of a truck Fi 4 is a vertical cross-.section on line 4-4 of `g-. 1; Flg. 5 1s a vertical-'cross-sectlon on bolster.

sheet of drawings e structure shwnin Fig.'

line o--5 of Fig. 1; and Fig. 6 is a vertical crossfsection on line -f of Fig. 3.

The bolster-'shown on the drawi-ngs'is pref? 'erably cast in one-piece and is of substan-A tiallyv T. shape in crosssection. The top plate compression member- 10 is slightly cambered `or concaved and has integral therewith at'the center of its top surface a center bearing portion 1 1. Also 'unitary withvthis com ressionmember and rising from its top sur ace area pair of side bearing inernbers12, 12.

tral ortion and under side of-.compression Depending from the cenf mem er 10 is a vertical plate or web 13 which l extends the full length of the bolster and which may be apertured. at 14, 14 for a reduction of weight.

Beneath the 'center bearing 11 the vertical member 13 has a cylindrical boss 15, the boss which join the en s of compression member 10 and flat horizontal plate'portions 19 at the ends of the'lowerrnargin of member 13. Alrojecting downwardly from the under surface of compression member 10 and i'ntegral therewith I provide a -pair of strengthening ribs or flanges 20 which are disposed 'beneath the center bearing 11 and between the vertical'member 13 and flanges 1'7. The object oithese-ribs is to aid in sustaining and su porting the center bearing which carries substantially all` of the load thrust upon the deepest imme 'ately belowl the centerl bearing and Agradually tapering toward the bottom surface of compression member 10 until merged into `the same. These ribs-or fianges 20" are comparatively short as shown on the drawin being about one-fourth the length Flan es 20 vary in depth, being,

of the olster, but as will readily be understood bythose skilled in this art their dimen- .sions'may be varied to meet the demands of the bolster. -The foot orlower'portion of the. upright member 13"is rovided with' an enlargement or bulb 21 willich varies inl thickness as is clearly shown in Figs. 4 and 5, vbeing thickest at the extremelower edge of member The sides of enlargement 21 are preferably curved and I prefer to have them slightly re that is the enlargement 21, is much more satis'factory to castthan the flanges of the older types of holsters. Where flat flanges are employed it is necessary to make them of considerable lvwidth in order to be strongenough to satisfactorilyv withstand the strains to which they are subjected, and, consequently,

in casting holsters of this type there is a considerable ortion of overhanging sand to form the anges which is likely to become displaced or dislodged causing a defective casting. Vith my improved form of bolster I obtain the desired result since I use a substantial quantity of metal in the enlargement 21 and this metal is spaced away suflicientlv y fromV the neutral axis of the bolster so that the device has adequate strength for the purpose intended. Owing to the shape of this enlargement or boss only a comparatively small amount of sand overhangs the mold and the tendency for the sand to break away is greatly reduced.

Minor mechanical changes in the structure shown and described may be made by these skilled in this art Without departure from my invention and without sacriicing itsA bene ts and advantages.

vness to the lower edge of said vertical portion, substantially as` described.

2. A cast metal truck bolster of substantially T-shape in cross-section having an enlargement or bulb at the foot of the vertical portion orleg of the bolster, said enlargement or bulb having curved or rounded sides and gradually increasing in thickness to the lower edge of said vertical portion, substantially as described. i

S. A cast' metal truck bolster of substantially T-shape in cross-section having an enlargement or bulb at the foot .of the vertical portion or leg of the bolster, said enlarge-- ment or bulb having sidesV each reversely curved, said enlargement gradually increasing in thickness to the lower edge of said vertical portion, substantially as described.

GEORGE G. FLOYD.

Witnesses E. W. PALMQUIST, E. B. SHERZER. 

